Stone-planing machine



H. KOROMOGAWA.

STONE PLANING MACHINE. APPLICATION FILED MAY2I11920.

1,371,31 1 Patent ed Mar. 15, 1921.,

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ll. KOIIOMOGAWA. STONE PLAIING MACHINE. APPLICATION FILED V21, 1920.

"Patented Mar. .15, 1921.

2- SHEETS-SHEETZ- I Z W UNITED STATliS HIDEO KOBOMOGAWA, OF OKUBO,

TOYOTAMA-GUN, JAPAN.

STONE-PLANING MACHINE.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed May 21, 1920. Serial No. 383,284.

To all whom it may concern:

Be it known that I, Hrono Kononoexwx, subject of the Emperor of Japan,residing at No. 212 Hyakunin-machi, Okubo. Toyotamagun, Tokyoprefecture, Japan, have invented certain new and useful -improvements inTtone-Planing Machines, of which the following is a specification.

This invention relates to improvements in stone planing machines and itis particularly devised to automatically plane a particular surface of astone after the machine has been initially set.

The object of the invention is to provide a stone planing machinedesigned to support and move the stone beneath a revolving cutterrotating in a fixed plane, and to furnish mechanism for automaticallyshifting the stone so that one of its surfaces will be brought to aparticular plane without manually controlling the machine after it hasbeen originally set.

With the foregoing object outlined and with the other objects in viewwhich will appear as the description proceeds, the invention consists inthe novel features hereinafter described in detail. illustrated in theaccompanying drawings and more particularly pointed out in the appendedclaims.

Referring to the drawings,

Figure 1 is a longitudinal sectional view of the machine. Fig. 2 is abottom plan view of the same. 7

Fig. 3 is a transverse sectional view of the machine taken on line A Bof Fig. 1.

Fig. '-1 is a top plan view of the machine.

In the drawing 1 represents a frame which in the present instance is inthe form of an inverted pan and mounted on the upper surface or table ofthe frame are a plurality of guide surfaces 2 having parallel V-shapedguiding grooves 2".

The guiding surfaces 2 are spaced apart to provide a central space inwhich the stone carrying box 3 operates, and this stone box has itsupper end open to receive a stone block 4:. The bottom of the box 3 isprovided with a plurality of supporting balls 6, which are mounted insemi-spherical casings 5. and the box 3 may be shifted longitudinallyand transversely of the bed plate or table by riding on these balls.

Mounted on the guiding surfaces 2 and 2 are sliding plates 7 and 7 whichare provided with depending V-shaped lugs which slide in the V-shapedgrooves of the guiding surfaces.

The adjacent ends of the sliding plates are provided with transverselydisposed bearings S in which are rotatably mounted threaded shafts 9which engage nuts 10 secured to opposite sides of the stone carrying box8. i

From the foregoing description it will be understood that the slidingplates 7 and 7 are used to shift the stone carrying box 3 longitudinallyof the machine and that the threaded shafts 9 are employed for shiftingthe stone-carrying box transversely of the machine.

The means for shifting the stone carrying box transversely will now bedescribed. The shafts 9 are provided at their forward ends with fixedbevel gears 11 which at certain intervals, that is at the ends of thelongitudinal movements of stone-carrying box, mesh with horizontallydisposed bevel gears 12. These bevel gears 12 are fixed to verticalshafts which extend through the table of the frame and the lower ends ofthe shafts are provided with fixed ratchet wheels 13 and 13', the teethof the ratchets being engaged by pawls 14 and 14 that are swiveled orpivoted on stud shafts 15 and 15 which depend from the under side of thetable of the frame. The pawls are secured to the forward ends of levers16 and 16 and the rear ends of the levers are designed to beintermittently engaged by trips 18 and 18 which are fixed to alongitudinall Y movable bar 17 that is slidably mounted in the lowerportion of the frame 1. The left-hand end of the bar 17 is provided witha bifurcated belt shifter 19.

The table of the machine bed 1 is provided with a plurality oflongitudinally disposed spaced vertical slots 20 in which are slidablymounted pins 21 and 21' which are fixed to the sliding plates 7 and 7and these depending pins engage the levers 16 and 16' at the ends of thelongitudinal strokes of the sliding plates 7 and 7 and cause said leversto strike trips 18 and 18 for the purpose of moving the belt shifter 19.

Mounted in the lower portion of the machine frame is a longitudinallydisposed horizontal rotatable shaft 25 which is provided with spacedscrew threads for a purpose which will be hereinafter described.

Mounted on one end of the shaft is a free pulley 22 and a fixed pulley23, and surrounding the shaft and freely mounted thereon is a sleeve 28carrying a fixed pulle 2 1. The threaded portions of the shaft 25 engagefixed nuts 26 and 26 carried by lugs which depend from the slidingplates 7 and 7 and slide in longitudinally disposed alined slots 27 and27 which are arranged in the bed of the machine frame.

When the belt shifter 19 is placed to con nee-t the driving belt withthe idle pulley 22 the machine will be inoperative, but when the beltshifter is moved to connect the belt with the pulley 23 the shaft 25will be driven in one direction and this will cause the threads of saidshaft to operate in the nuts 26 and 26 and cause the sliding plates 7and 7' together with the stone-carrying box 3 to be moved longitudinallyof the machine in one direction. When the sliding plates 7 and 7approach the end of their stroke in this direction one of the pins 21and 21 will strike its respective lever 16 or 16 and will cause one ofthe pawls 14; and 11 to turn one of the ratchets l3 and 13 through adistance equal to the distance between two teeth of one of said ratchetwheels. At this time one of the gear wheels 11 is in mesh with one ofthe gears 12 and this will cause one of the gear-wheels 11 to be turnedslightly. The shafts of the gear wheels 11 are connected together by acrossed belt or chain 4 1 so that movement of one of said gears 11 willcause simultaneous movement of the other gear 11 in the same direction,and simultaneous movement of the gears 11 will turn the shafts 9 andcause the threads of the same to move the nuts 10 and the stone-carryingbox slightl transversely of the bed of the machine rame.

For the purpose of moving the sliding plates 7 and 7' in the oppositedirection the lever 16 or 16 which has been previously struck by one ofthe pins 21 or 21 will operate or engage one of the trips 18 or 18 tocause movement of the belt shifter 19 to bring the belt into engagementwith the pulley 24:. This pulley will operate through a sleeve 28 andgears 29, 30, 31, 32 and 33 to drive the shaft 25 in a directionopposite to its initial movement and in consequence the nuts 26 and 26together with the sliding plates 7 and 7' and the stonecarrying box willbe returned to their original position, this cycle will continueautomatically until the stone 4 has been planed or dressed to thedesired extent.

Located at the ends of the machine are bearing posts 35 and 35 whichsupport a horizontal longitudinally disposed rotary and sliding 'of themachine bed plate,

shaft 36 which carries the planing cutter 34. This planing cutter isadapted to be fixed to the shaft 36 and to rotate in a fixed verticalplane and as the stone moves beneath the cutter said cutter will operateon the upper surface of the stone to bring the same to the desiredplane.

While I have shown and described the preferred embodiment of myinvention, I am aware that various changes and modifications may be madein the construction shown without departing from the spirit of theinvention as set forth in the following claims.

What I claim and ters Patent is:

l. A stone planing machine comprising a bed plate, a longitudinally andtransversely movable stone-carrying support movably mounted on the uppersurface of said bed plate, a rotary cutter movable in a fixed plane anddesigned to operate upon a stone carried by said support, platesslidably mounted on said bed plate and provided with fixed nuts, athreaded shaft engaging said nuts, means for rotating said shaft inopposite directions for moving said nuts plates in opposite directions,and means controlled by longitudinal movements of said bed plates forshifting the stone-carrying support transversely of the bed plate.

2. A stone planing machine bed plate provided with a plurality oflongitudinally disposed spaced guiding plates, a plurality of spacedsliding plates mounted on. said guiding plates, a stone-carrying supportsecured to said sliding plates and m0vable longitudinally andtransversely of said bed plate, a stone cutter rotatable in a fixedplane and designed to operate upon a stone desire to secure byLetcomprising a carried by said support, means for simultaneously movingsaid sliding plates and said stone-carrying support longitudinally andmeans controlled by longitudinal movements of said stone-carryingsupport for shifting the stone-carrying support transversely to the bedplate.

3. A stone planing machine comprising a bed plate provided withlongitudinally disposed spaced guiding plates, sliding plates mounted onsaid guide plates and carrying rotatably mounted. threaded shafts, astonecarrying support provided with nuts which engage said shafts, astone cutter rotatable in a fixed plane and designed to operate on astone carried by said stone support, members fixed to said slidingplates and provided with nuts, a second threaded shaft engaging the lastnamed nuts, means for rotating the second threaded shaft in oppositedirections for moving the sliding plates and stone-carrying supportlongitudinal of the bed plate, and means controlled by longitudinalmovement of said stone-carrying support for causing simultaneousmovements of the first named threaded shafts, for causing thestone-carrying support to be moved transversely of the bed plate.

4:. A machine of the kind defined by claim 1-, in which the guide platesand sliding plates are provided with cooperating grooves and projectionsfor preventing transverse movement of said sliding plates relatively tosaid guide plates.

A machine of the kind defined by claim 3 in which the first namedthreaded shafts are provided with fixed gears, gears mounted on the bedplate and designed to be intermittently engaged by said gears, ratchetsfixably connected tothe second named gears, pawls engaging saidratchets, levers pivotally connected to the bed plate and carrying saidpawls, pins fixed to the sliding plates and designed to intermittentlyengage said levers, a sliding rod carried by the bed plate and havingtrips intermittently engaged by said levers, and a belt shiftercontrolled by movement of said sliding rod.

6. A machine of the kind defined by claim 3 in which the means foroppositely rotating the second named threaded shaft comprises a beltengaged pulley fixed to the second named threaded shaft, a sleeveloosely mounted on the second named threaded shaft and provided with apulley designed to be engaged with a belt, a gear fixed to said sleeveand a gear fixed to the second named threaded shaft, and gearingconnecting the last named two gears.

In testimony whereof I arfiix my signature in the presence of twowitnesses.

HIDEO KOROMOGAWA. [Ls] Witnesses:

GENJI KURIBARA, S. NAKAO.

